title: Effects of aerobic exercise training and irbesartan on blood pressure and heart rate variability in patients with chronic obstructive pulmonary disease.
abstract: OBJECTIVE
  The present pilot study was undertaken to evaluate the efficacy of an aerobic exercise training (AET) program alone or combined with an antihypertensive agent (irbesartan) to reduce blood pressure (BP) and enhance heart rate variability (HRV) in chronic obstructive pulmonary disease patients.
  
  
  METHODS
  Twenty-one patients were randomly assigned to a double-blind treatment with exercise and placebo (n=11) or exercise and irbesartan (n=10). Subjects underwent 24 h BP monitoring and 24 h electrocardiographic recording before and after the 12-week AET. HRV was investigated using three indexes from the power spectral analysis and three indexes calculated from the time domain. The AET program consisted of exercising on a calibrated ergocycle for 30 min three times per week. Five patients in the placebo group were excluded during follow-up because they were not compliant.
  
  
  RESULTS
  There was no change in 24 h systolic and diastolic BP before (130+/-14 mmHg and 70+/-3 mmHg, respectively) and after (128+/-8 mmHg and 70+/-8 mmHg, respectively) exercise training in the placebo group, whereas in the irbesartan group systolic and diastolic BP decreased from 135+/-9 mmHg and 76+/-9 mmHg to 126+/-12 mmHg and 72+/-8 mmHg, respectively (P<0.02). There were no changes in HRV parameters in either group.
  
  
  CONCLUSIONS
  The present study suggests that a 12-week AET program is not associated with a significant reduction in BP or enhancement in HRV, whereas an AET program combined with irbesartan is associated with a reduction in 24 h BP.
authors.affiliation: Centre de recherche de l'hôpital Laval, Institut universitaire de cardiologie et de pneumoloigie de L'Université Laval, Québec, Canada.
authors.forename: Karine
authors.initials: K
authors.lastname: Marquis
authors.forename: Fracois
authors.initials: F
authors.lastname: Maltais
authors.forename: Yves
authors.initials: Y
authors.lastname: Lacasse
authors.forename: Yves
authors.initials: Y
authors.lastname: Lacourciere
authors.forename: Claudette
authors.initials: C
authors.lastname: Fortin
authors.forename: Paul
authors.initials: P
authors.lastname: Poirier
mesh_terms: D000368:Aged; D000804:Angiotensin II; D047228:Angiotensin II Type 1 Receptor Blockers / Q000008:administration & dosage*; D001713:Biphenyl Compounds / Q000008:administration & dosage*; D001794:Blood Pressure / Q000187:drug effects* / Q000502:physiology; D018660:Blood Pressure Monitoring, Ambulatory; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D015716:Electrocardiography, Ambulatory; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D005541:Forced Expiratory Volume / Q000502:physiology; D006339:Heart Rate / Q000187:drug effects* / Q000502:physiology; D006801:Humans; D000077405:Irbesartan; D008297:Male; D010865:Pilot Projects; D029424:Pulmonary Disease, Chronic Obstructive / Q000503:physiopathology / Q000628:therapy*; D013777:Tetrazoles / Q000008:administration & dosage*; D016896:Treatment Outcome
chemical_list: D047228:Angiotensin II Type 1 Receptor Blockers; D001713:Biphenyl Compounds; D013777:Tetrazoles; D000804:Angiotensin II; D000077405:Irbesartan